Shuttle motion



A. SCHIAPPA Jan. 10, 195

SHUTTLE MOTION 2 ts-Sheet 1 Filed June 22, 1955 FIG. I

m m m w.

ANTONIO SCHIAPPA ATTORNEY Jan. 10, 1956 A. SCHIAPPA 2,730,138

SHUTTLE MOTION Filed June 22, 1955 2 h ts-Sheet 2 63 55 FIG. 3

INVENTOR.

ANTONIO SCH IAPPA ATTORNEY United States Patent f) This inventionrelates to improvements in shuttle motions and more particularly to theshuttle motion in a narrow fabric loom.

One of the objects of the present invention is to'pro-' vide an improvedshuttle motion'for. a" narrow fabric loom.

Another object of the present inventionis to provide an improved shuttlemotion for a narrowfabric- 'loom' which has fewer parts,'improvedshuttle motion'control' and the almost complete. elimination of loomsmashes.

Narrow fabric looms are customarily made with a lay having a rack rodmovable longitudinallytherein and meshing with pinions' which in. turnhave driving relation with racks ontheshuttles. As the rack rod is movedin one direction lengthwise of the laythepinions' are rotated and causemovement ofithe shuttles in the opposite direction through the "warpthreads and across the fabric space. The rack rod moves in a straightline and is moved positively back and forth by'mechanieal devices onopposite endsof the loom which "must be synchronized in accuratetimed'relation.

In the past the mechanical devices consisted of shuttle pulleys, shuttlestraps, shuttle pulle'ystands and lay wires. The present inventioneliminates these devices and "the need of mechanism on both ends of theioom; This removes the need of accurate timing of devices on oppositeends of the loom and the consequentsmashes when the timing was off.

A further object of the present inventionis the elimination of breakdown time and loom idlenessdneno smashes, which originate in part in thestretchof shuttle straps and lay wires. 7

And still another object of the present invention is'the elimination ofleather shuttle straps and thexconse'quent faulty work produced by thelo'om du'e to the stretch of the leather which resulted in failure topullthe rodrack the desired distance.

Other objects of the present invention'will become apparent in part andbe pointedout in'part inthe'following specification and'claims;

Referring to the drawingsi'wherein'similar characters of referenceindicate" correspondingparts' in all the figures: H

Figure 1 is a perspective view of the new and improved shuttle motion.

Figure 2 is a plan view of the lay; rack rod'and shaft 2 which has itsbearing in frame Hand is driven in a man ner well known to theCrompton-Knowles narrow fabric loom of which it is a'standard part'.

A- crank pin 13 is fixed toithe spokes of crown gear 12. Shaft 14 ofcrowngea'r 12 projects outwardly fromv frame llandhas-acrankllS providedwith arms 16 and .17 mounted for independent. rotation thereon Elongatedslots 18 and 19 are provided in arms '16 and 17 respectiveiy. Crankpin-13engages elongatedslot 16 to drive crank 15. A universal joint isprovided consisting of an arm 20 integrally formed with the lower part21 of a hearing, the upperpart 23 of which is bolted by means of bolts24 to lower'part 21 and to a shaft 9 which is threaded on opposite endsto accommodate nuts 27 and 28. A pillow block 25 provided with teeth 29in one face is slidably mounted on the shaft 9. Arm 17 is provided withteeth 26 which are engageable with teeth 29. A- washer 39 is placed onthe shaft between nut 23 and pillow block 25. The turning-of nuts 27 and39 forces bearing 21, 23 against pillow block 25 and the engagement ofteeth 26, 29 so that the shaft 9 is firmly but adjustably held inarm 17.

A yoke 30 is pivotally connected to arm 20 by means of pin 31. A collar32 integrally formed with yoke 30 is provided with an internal thread. Aconnecting link 33 is provided with threads 34 which engage the internalthreads in collar 32 and are secured against Working apart by means of alock nut 35.:

The lay 40 has slidably mounted therein a rack rod 42which meshes withthe pinions for the shuttles and is arranged for longitudinalreciprocation along the lay to cause the pinions to rotate first in onedirection and then in the other. This is common construction in a narrowfabric-loom and of itself forms no part of the present invention.

A bracket 41 is secured to the lay 40 by means of bolts 79. A swivelbearing 43 is-secured to bracket 41 by means of nut and boltcombinations 44, 45. The picker motionrod 36 secured by means of bolt topicker motion jack 37 having a base 38.which rests on the mill floor isstandard construction in Crompton-Knowles nar' row fabric looms; A block46 provided with a bearing 47 is secured to base 38 by means of bolt1G1. A lay sword shaft 103 is mounted in bearing 47. A collar 104 is.fixed tollay sword shaft 103. A lay sword (not shown) rocks lay swordshaft 103, collar? 104 and lay it). The. lay sword (not shown) and laysword shaft 1&3 are standard construction ofa Crompton-Knowles narrowfabric loom and as such are well known in the art. A. shaft '48 is.seated-in collar 104 andis mounted in swivel. bearing 43.

A bracket 50 having a depending arm 51 is fixed to shaft 43. A plate 52having projection 54 is (see Figure 6) adjustably secured to arm 51 bymeans of nuts and bolts 53 which-pass through an elongated slot in arm51. A stub shaft 55 is fixed in projection 54-. A "block 56 is.pivotally connected to stub shaft 55. A yoke 66 provided with a collar61 having internal threads is pivotally connected to block- 56' by meansof a pin 63 to form a universal joint. Connecting link 33 is providedwith threads 64 which engage the-internal threads in collar. 61-.vThreads 61, 64 are secured from working apart by means of lock nutv 65.

A lever arm 66 provided with a'series of holes 67 is, secured to shaft48. A plate 70 having teeth which engage the recesses in the rack rod 42lays on said rack rod .42. An intermediate member 71 is recessed toaccommodate and lay on top of plate 70.. A U-shaped covering 72 providedwith a cross member 73 straddles rack rod 42 and "plate 70. A series ofpins 74 posi-v tioned in the legs of the. U of covering 72 underlie rackrod"42.* Twoscrews*75,"provided in" covering 72 abut the top ofintermediate member 71. Screws 75, 76 force intermediate member 71against plate 70 which abuts rack rod 42 to force rack rod 42 againstpins 74 to provide a construction which allows cross member 73 to beadjustably positioned along rack rod 42.

A connection is provided consisting of a. shaft 196 which is pivotallymounted in cross member 73 and a rod 77. A second connection 78 isprovided consisting of a threaded member 80 and a rod 81. Threadedmember 80 engages one of the series of holes 67 and is secured thereinby means of a nut 82. A split tube 83 houses rods 77 and 81. Twocouplings 85, 86 secured split tube 83 to rods 77, 81 to form a tie rod.

Referring to Figure 4 wherein is shown a modified form of driveconnection which may replace the universal joint comprising arm 51,plate 52, etc., by providing a bevel gear 90 fixed to shaft 48 and acompanion bevel gear 91 loosely mounted on lay sword shaft 103. A leverarm 93 is fixed to bevel gear 91. Yoke 60 is pivotally secured to leverarm 93 by means of pin 95.

In operation crown gear 12 will be rotated in a manner well known to theCrompton-Knowles narrow fabric loom. Rotation of crown gear 12 willcarry with it crank pin 13 which will rotate crank 15 with arms 16, 17.Rotation of arm 17 will carry with it bearing 21, 23 and arm 20 whichwill cause connecting link 33 to reciprocate in a crank type motion.Connecting link 33 through yoke 60, arm 51 and plate 52 will rock shaft48 whereby lever arm 66 reciprocates through an are carrying with itsplit tube 83 and rods 81, 77. Rod 77 through cross member 73 willreciprocate rack rod' 42.

It will be noted that the position for reciprocation of rack rod 42 isadjustably controlled through split tube 83 which allows rods 81, 77 tobe adjustably inserted lengthwise. Holes 67 adjust the throw of splittube 83 through lever arm 66. Nuts 53 allow an adjustment of plate 52which influences the throw of yoke 60. And the adjustment of arm 20through the shaft in bearing 21, 23 in arm 17.

Connecting link 33 through lever arm 93 will transfer the motion ofcrank 15 to bevel gear 90 and shaft 48.

Having shown and described preferred embodiments of the presentinvention, by way of example, but realizing that structural changescould be made and other examples given without departing from either thespirit or scope of this invention.

What I claim is:

1. In a narrow fabric loom having a crown gear, and a rocking lay, arack rod reciprocatingly mounted in said lay, a crank drive driven bysaid crown gear, a bracket secured to said rocking lay, a swivel bearingmounted in said bracket, a substantially vertical shaft mounted in saidswivel bracket, means connecting said vertical shaft with said rack rodand a second means connecting said vertical shaft with said crank drivewhereby said crank drive reciprocates said rack rod through saidvertical shaft and said rocking lay through said bracket and swivelbearing rocks said vertical shaft.

2. In a narrow fabric loom having a crown gear, a rocking lay, a rackrod reciprocatingly mounted in said lay, a crank drive driven by saidcrown gear, a substantially vertical shaft having an arm fixed to itsupper end and having means on its lower end to provide a connection withsaid crank drive to reciprocate said vertical shaft, a bracket securedto said lay, a swivel bearing located in said bracket, said verticalshaft being mounted in said swivel bearing, a tie rod connecting saidarm with said rack rod whereby said crank motion through said verticalshaft reciprocates said rack rod and said rocking lay through saidbracket and swivel bearing rocks said vertical shaft.

3. In a narrow fabric loom having a crown gear, a rocking lay and apicker motion rod bracket, a rack rod reciprocatingly mounted in saidlay, a crank drive driven by said crown gear, a substantially verticalshaft, a

bracket secured to said lay, a swivel bearing mounted in said bracket, asecond bearing mounted on said picker motion rod bracket, said verticalshaft being mounted for reciprocating movement in said swivel bearingand said second bearing a bevel gear fixed to said vertical shaft, asecond bevel gear meshing with said first bevel gear and reciprocatinglymounted in said second bear- 1 ing, a first means connecting said secondbevel gear with said crank motion to reciprocate said vertical shaft anda second means connecting said vertical shaft with said rack rod toreciprocate said rack rock.

4. In a narrow fabric loom having a crown gear, a rocking lay, and apicker motion rod bracket, a rack rod reciprocatingly mounted in saidlay, a crank drive driven by said crown gear, a substantially verticalshaft having an arm fixed to its upper end and a second arm adjacent itslower end, a bracket fixed to said lay, a swivel bearing, for the upperend of said shaft, mounted in said bracket, a second swivel bearing onthe lower end of said shaft mounted in said picker motion rod bracket, aconnecting link, a universal joint uniting said connecting link withsaid crank drive, a second universal joint uniting said connecting linkwith said second arm and a tie rod connecting said rack rod with saidarm fixed to the upper end of said shaft.

5. In a narrow fabric loom having a crown gear, a rocking lay and apicker motion rod bracket, a rack rod mounted for reciprocating motionin said lay, a crank drive driven by said crown gear including an armhaving an elongated slot, a horizontal shaft adjustably secured in seidslot, a second arm integrally formed as part of a hearing, said bearingbeing secured to said horizontal shaft, a substantially upright shafthaving a third arm fixed to its upper end, a fourth arm fixed to thelower section of said upright shaft, a bracket fixed to said lay, aswivel bearing mounted in said bracket, the upper end of said uprightshaft being mounted for rocking motion in said swivel bearing, a secondswivel bearing mounted in said picker motion rod bracket, the lower endof said upright shaft being mounted in said second swivel bearing, aconnecting link having a yoke on one end, said yoke being pivotallyconnected to said second arm, a universal joint connecting saidconnecting link with said fourth arm, and a tie rod adjustably andpivotally connecting said third arm with said rack rod.

6. In a narrow fabric loom having a crown gear, a rocking lay and apicker motion rod bracket, a rack rod mounted for reciprocating motionin said lay, a crank drive driven by said crown gear including an armhaving an elongated slot, a horizontal shaft adjustably secured in saidslot, a bearing, a second arm integrally formed as part of said bearing,said bearing being secured to said horizontal shaft, a vertical shafthaving a third arm fixed to its upper end and a fourth arm fixed to itslower end, a bracket secured to said rocking lay, a swivel bearingmounted in said bracket, the upper section of said vertical shaft beingmounted for rocking and reciprocating motion in said swivel bearing, asecond swivel bearing mounted in said picker motion rod bracket, thelower section of said vertical shaft being mounted for rocking andreciprocating motion in said second swivel bearing, a connecting linkhaving a yoke on one end pivotally connected to said second arm, auniversal joint connecting said connecting link with said fourth arm, atie rod consisting of a first rod adjustably connected to said third armand a second arm, a split tube adjustably connecting said first andsecond rods, a cross member adjustably secured to said rack rod and saidsecond rod pivotally connected to said cross member.

References Cited in the file of this patent UNITED STATE PATENTS1,326,528 Perks Dec. 30, 1919 2,002,973 Bartholomew May 28, 19352,179,347 Payne Nov. 7, 1939

